Question

An electron moving witha velocity of 5×104 m/s enters into a uniform electric field and aquire a uniform acceleration of 104m/s2 in the direction of its initial motion 1st calculate the time in which the electron would acquire a velocity double of its initial velocity
​

Answer 1

Answer:

Initial velocity of the electron is u =5×10

4

m/s

Acceleration of the electron is a=10

4

m/s

2

From first equation of motion,

v=u+at

2u=u+at

t=u/a=(5×10

4

)/(10

4

)=5s

(C) 5